CNTs-anchored egg shell membrane decorated with Ag-NPs as cheap but effective SERS substrates
CNTs-anchored egg shell membrane decorated with Ag-NPs as cheap but effective SERS substrates
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纳米银纳米粒子修饰的碳纳米管锚定蛋壳膜作为廉价但有效的 SERS 基底
DOI：
10.1007/s40843-015-0032-7
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发表时间：
2015-03-01
影响因子：
8.1
通讯作者：
Zhang, Zhuo
中科院分区：
文献类型：
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作者：
Wang, Meiling;Meng, Guowen;Zhang, Zhuo
我们报道了一种简单的方法，通过超声吸附碳纳米管（CNTs）和随后的Ag溅射，制备了一种廉价而有效的表面增强拉曼散射（Sers）活性基底，该基底由天然蛋壳膜（ESM）接枝Ag纳米颗粒（Ag-NPs）修饰的碳纳米管（CNTs）（记为Ag-NPs@CNTs@ESM）组成。由于高密度Ag-NP被溅射到固定在ESM膜上的每个CNT上，因此在相邻的Ag-NP之间实现了均匀的纳米级间隙，从而导致高Sers活性，在整个膜上具有优异的Sers信号均匀性。以Ag-NPs@CNTs@ESM膜为表面增强拉曼光谱（SERS）基底，（最危险的杀虫剂之一），PCB-3（属于持久性有机污染物的多氯联苯同系物之一）和牛血清白蛋白分别检测到浓度低至10− 11 M、10− 6 M和0.1 ppb的BSA（生物分子），在环境污染物和生化物质的快速痕量检测中显示出良好的应用前景。
We report a simple approach for the fabrication of cheap but effective surface-enhanced Raman scattering (SERS) active substrates consisting of natural egg shell membrane (ESM) grafted with Ag-nanoparticles (Ag-NPs) decorated carbon nanotubes (CNTs) (denoted as Ag-NPs@CNTs@ESM), via ultrasonic adsorption of CNTs on the ESM and the subsequent Ag-sputtering. As high density Ag-NPs were sputtered onto each CNT anchored on the ESM nanofiber, homogeneous nanoscaled gaps between the neighboring Ag-NPs were achieved, leading to high SERS activity with excellent SERS signal homogeneity over the whole membrane. Using the Ag-NPs@CNTs@ESM membranes as SERS-substrates, methyl parathion (one of the most hazardous insecticides), PCB-3 (one congener of polychlorinated biphenyls belonging to persistent organic pollutants) and bovine serum albumin (BSA, biomolecules) with a concentration down to 10−11M, 10−6M and 0.1 ppb were detected respectively, showing promising potentials in rapid trace detection of environmental pollutants and biochemicals.